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Thread: tRFC Memory Question




  1. #1
    Join Date
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    Cool tRFC Memory Question

    Can the tRFC refresh cycle time be to high? Mine is set at 72 on auto.

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  2. #2
    Chike is offline Senior Member
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    Default Re: tRFC Memory Question

    If it is set by auto it is set according to manufacturer spec that are programed to SPD.
    However, usually much lower is possible (close to tRFC for DDR-800) with the higher voltage that is required for higher DDR rates.

    Of course there is no point changing it if there is no gain in bandwitdh or lower latencies.

  3. #3
    profJim's Avatar
    profJim is online now Chief Munchkin + moderator
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    Default Re: tRFC Memory Question

    If you post the information from steps 2, 3 and 4 from this post, we can help you optimize your bios settings for maximum memory performance.

    Have you run any stability/stress tests with your current setup? If yes, which tests and how long did each test run?
    Q9650 @ 4.10GHz [9x456MHz]
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  4. #4
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    Default Re: tRFC Memory Question

    A tRC (Row Cycle Time) of 72 seems high to me though. I can run my DDR3 on 1333Mhz with a tRC of 27 (24h Prime95 'Blend' stable). Default is 33 for me (OCZ3G1600LV4GK).

    /edit: oops, you were talking about tRFC..
    AMD Phenom II X4 955 Black Edition | Scythe Mugen 2 Rev. B | Gigabyte GA-770TA-UD3 | OCZ OCZ3G1600LV4GK (4GB) | Club3D HD5850 | Intel SSDSA2MH080G2R5 (80GB) | Corsair TX650W

  5. #5
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    Default Re: tRFC Memory Question

    seems fine to me at 72,mine run at 100 on auto but ive manually set it to 88
    Gigabyte ex58-ud5 f12 bios
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